CVE-2018-8584

HIGH

Windows 10 and Windows Server 2016/2019 - Elevation of Privilege via ALPC

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2018-8584. PoCs published by Google Security Research.

AI-analyzed exploit summary The exploit leverages a TOCTOU (Time-of-Check Time-of-Use) vulnerability in the Data Sharing Service (DSSVC) on Windows 10 1803/1809, allowing arbitrary file deletion due to improper handling of file permissions in PolicyChecker::CheckFilePermission. The PoC demonstrates this by exploiting per-user drive redirection to delete files inaccessible to the user but accessible to SYSTEM.

Description

An elevation of privilege vulnerability exists when Windows improperly handles calls to Advanced Local Procedure Call (ALPC), aka "Windows ALPC Elevation of Privilege Vulnerability." This affects Windows Server 2016, Windows 10, Windows Server 2019, Windows 10 Servers.

Exploits (1)

exploitdb WORKING POC VERIFIED
by Google Security Research · textlocalwindows
https://www.exploit-db.com/exploits/46104

The exploit leverages a TOCTOU (Time-of-Check Time-of-Use) vulnerability in the Data Sharing Service (DSSVC) on Windows 10 1803/1809, allowing arbitrary file deletion due to improper handling of file permissions in PolicyChecker::CheckFilePermission. The PoC demonstrates this by exploiting per-user drive redirection to delete files inaccessible to the user but accessible to SYSTEM.

Classification
Working Poc 95%
Attack Type
Lpe
Complexity
Moderate
Reliability
Reliable
Target: Windows 10 1803 and 1809 (Data Sharing Service)
Auth required
Prerequisites: User-level access to the system · Ability to create symbolic links or redirect drives · Target file path inaccessible to the user but accessible to SYSTEM
devstral-2 · analyzed Feb 18, 2026 Full analysis →

References (4)

Core 4
Core References
Third Party Advisory, VDB Entry vdb-entry x_refsource_sectrack
http://www.securitytracker.com/id/1042119
Exploit, Third Party Advisory, VDB Entry exploit x_refsource_exploit-db
https://www.exploit-db.com/exploits/46104/
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/105808

Scores

CVSS v3 7.8
EPSS 0.0270
EPSS Percentile 84.0%
Attack Vector LOCAL
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Details

CWE
CWE-367
Status published
Products (10)
microsoft/windows_10
microsoft/windows_10 1607
microsoft/windows_10 1703
microsoft/windows_10 1709
microsoft/windows_10 1803
microsoft/windows_10 1809
microsoft/windows_server_2016
microsoft/windows_server_2016 1709
microsoft/windows_server_2016 1803
microsoft/windows_server_2019
Published Nov 14, 2018
Tracked Since Feb 18, 2026